Sidebar
Table of Contents
GPC Data Types
Introduction
For using the functions, better understanding of the examples, especially for using the Persistent Memory and Interactive Configuration you have to know the different Data Types available, their Value Range and their Storage Size (1 byte == 8bits).
You should choose the Type with the smallest Size by the value Range you will need for your variable. This will save script size and Persistent Memory space allowing you to put more stuff into a single script.
When your variable is of a different data type than the function requires or returns you can use type casting.
Example:
The get_val() functions returns a value using fix32, the variable Value used for comparing is int8.
To be able to compare them you can cast Value to fix32 in the if statement.
int8 Value=100; if (get_val(BUTTON_1) == (fix32)Value) { } // (fix32) , (int) , ...
Data Types
| Type | Range | Size | Examples / Notes |
|---|---|---|---|
| bool1) | FALSE or TRUE (0 to 255) | 1 byte | bool b=TRUE; if (b) { //TRUE }
|
| char2) | -128 to 127 | 1 byte | char c='A'; if (c=='A') {}
|
| int3) | -32768 to 32767 | 2 bytes | int i=-400; if (i==-400) {}
|
| uint8 | 0 to 255 | 1 byte | uint8 u=190; if (u==190) {}
|
| uint16 | 0 to 65535 | 2 bytes | uint16 u=40123; if (u==40123) {}
|
| uint32 | 0 to 4294967295 | 4 bytes | uint32 u=312267; if (u==312267) {}
|
| int8 | -128 to 127 | 1 byte | int8 i=-100; if (i==-100) {}
|
| int16 | -32768 to 32767 | 2 bytes | int16 i=-400; if (i==-400) {}
|
| int32 | -2147483648 to 2147483647 | 4 bytes | int32 i=40199; if (i==40199) {}
|
| fix32 | -32768.000000 to 32767.999985 | 4 bytes | fix32 f=1400.0; if (f==1400.0) {}
You can use f for .0 |
| fix32 4) | -127.99 to 127.99 | 2 bytes | fix32 f=120.0; if (f==120.0) {}
|
| Other available aliases | |||
| unsigned char | 0 to 255 | 1 byte | alias of uint8 |
| unsigned int | 0 to 65535 | 2 bytes | alias of uint16 |
| long | -2147483648 to 2147483647 | 4 bytes | alias of int32 |
| long int | -2147483648 to 2147483647 | 4 bytes | alias of int32 |
| unsigned long | 0 to 4294967295 | 4 bytes | alias of uint32 |
| unsigned long int | 0 to 4294967295 | 4 bytes | alias of uint32 |
| accum | -32768.000000 to 32767.999985 | 4 bytes | alias of fix32 |